SU968667A1 - Device for diagnosis of bearings - Google Patents

Description

(54) FAIL FOR DIAGNOSTICS OF BEARINGS

I

The invention relates to the bearing industry and can be used for bearing diassyutika. . A device for diagnosing bearings, a roll comprising a vibration sensor connected in series, an amplifier and a matching circuit, memory and threshold blocks, and digital transducers-indicators D are known.

However, the known device has a low efficiency and accuracy of diagnosis of sub-clips.

The aim of the invention is to improve the efficiency and accuracy of diagnosis of podishpnik.

The goal is achieved by the fact that a device containing serially connected vibration sensors, amplifiers and coincidence circuits, storage, threshold blocks and 1 and 1 pointer transducers, is equipped with a multiplication unit whose input is connected to the amplifier output, and the output with the circuit inputs is identical, sequentially connected generators and circuits

the outputs of which are connected to the second inputs of the coincidence circuits, and a cyclic device, the output of which is connected to the second inputs of the block of the speed and comparison circuit.

The drawing shows the block diagram of the device.

The device contains serially connected 1 vibrations, amplifier 2, multiplication unit 3, matching circuits 4, containing 5 and threshold 6 blocks of digital transducer-pointer 7, as well as geerators 8 and comparison circuits 9, the outputs of which are connected to the second inputs of circuits 4 the same cyclic device 10, the output of which is connected. with the second inputs of the multiplication unit 3 and the circuits 9 compared.

The device operates in an erroatl way. Vibration sensor1 converts the vibrations of the diagnosed bearing into an electrical signal K (t), which is fed by amplifier 2 and fed to the first input of multiplication unit 3. The values of the signal x (t) under investigation are appealed to the equivalent of the instantaneous cosine 319 (sine) value, which is derived from a special cyclic device 10. The resulting partial products are summed, which results in a dnpeers and frequency frequencies being processed . When determining the frequency components of the vibration spectrum of a tested bearing, the generators 8 generate pulses muioo 6pa3Hoi; o and series, proportional to the instantaneous cosine component, the cyclic device 10 generates sawtooth pulses. The frequency of pulses of a sawtooth voltage generated by the cyclic device 10. must be such, but the intersection points of the sawtooth voltages of the cyclic device 10 and generators 8 could be fairly accurately represented by the pulsed voltage pulses generated by the generators 8. The instantaneous voltage of the cyclic voltage from the cyclic device 10 to the multiplication unit 3 is assigned to the corresponding the weight and its transition to the current order of the process x (t) under investigation is carried out. If the sawtooth stresses on the cyclic device 10 and any of the gamers 8 coincide, the comparison circuit 9 opens the corresponding circuit 4 that coincides, and the corresponding product enters the storage unit 5. The intersection points of the cyclic sawtooth voltages, 8 describe the sequence the voltages of the generators 8. The voltages from the memorized blocks 5 are compared with the reference voltage of the threshold blocks b. If the voltage from the output of any storage unit S exceeds the reference voltage of the threshold unit 6, then a pulse will appear at its output, which will then flow to a digital pointer-pointer 7, the readings of which indicate the presence of vibration at the information frequency under study, which will allow set the type of bearing to be checked. The device allows parallel analysis of several information frequencies and, based on this analysis, it can detect several defects. Parallel analysis allows you to immediately fix the beginning of abnormal operation of the bearing by changing the dispersion in the frequency range under study. Formula for diagnostics of bearings, containing sequential vibration sensor, amplifier and coincidence circuits, memory blocks, threshold blocks on digital indicator-converters, characterized in that, in order to improve the efficiency and accuracy of diagnostics, it is equipped with a multiplication unit, input which is connected to the output of the amplifier, and the output with the inputs of the circuits is the same, sequentially connected by generators n comparison circuits, the outputs of which are connected to the second inputs of the circuits coincident, n cycles eskim device whose output is connected to second inputs of the multiplying circuits and comparing unit. Sources of information adopted in the review of the examination I. USSR author's certificate number 525867, to. About 01 M 13/04, 1976 (prototype).

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Claims (1)

Claim A device for diagnosing bearings, containing serially connected vibration sensors, amplifiers and matching circuits, memory blocks, threshold blocks and digital converters-pointers, characterized in that, in order to increase the efficiency and accuracy of diagnostics, it is equipped with a multiplication unit, the input of which is connected with the output of the amplifier, and the output with the inputs of the matching circuits connected in series by generators and comparison circuits, the outputs of which are connected to the second inputs of the matching circuits, and a cyclic device Whose output is coupled to second inputs of the multiplier and comparison circuits. - Sources of information taken into account in the examination 1. USSR author's certificate K® 525867, cl. G 01 M 13/04, 1976 (prototype). 9686b7 ’Editor G. Us